Velocity in relation to distance from edge

Looking at relationship between velocity and the Y axis

Looking at relationship between velocity and the X axis

for (i in 1:length(ind)){
plot(TotalData$v[TotalData$D_V_T==ind[i]],
     TotalData$X[TotalData$D_V_T==ind[i]],
     xlab = "Velocity (cm/s)",
     ylab = "X Axis (cm)",
     main = "") 
}

NA
NA
NA

Looking at relationship between velocity and the Z axis

for (i in 1:length(ind)){
plot(TotalData$v[TotalData$D_V_T==ind[i]],
     TotalData$Z[TotalData$D_V_T==ind[i]],
     xlab = "Velocity (cm/s)",
     ylab = "Z Axis (cm)",
     main = "") 
}

NA
NA
NA